Lower Received MIME type when creating a response blob.

Source/core/xmlhttprequest/XMLHttpRequest.cpp

 /*
  *  Copyright (C) 2004, 2006, 2008 Apple Inc. All rights reserved.
  *  Copyright (C) 2005-2007 Alexey Proskuryakov <ap@webkit.org>
  *  Copyright (C) 2007, 2008 Julien Chaffraix <jchaffraix@webkit.org>
  *  Copyright (C) 2008, 2011 Google Inc. All rights reserved.
  *  Copyright (C) 2012 Intel Corporation
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Lesser General Public
  *  License as published by the Free Software Foundation; either
@@ skipping 419 matching lines @@
             // data to a file-handle directly in the browser process. We get
             // the file-path from the ResourceResponse directly instead of
             // copying the bytes between the browser and the renderer.
             m_responseBlob = Blob::create(createBlobDataHandleFromResponse());
         } else {
             OwnPtr<BlobData> blobData = BlobData::create();
             size_t size = 0;
             if (m_binaryResponseBuilder && m_binaryResponseBuilder->size()) {
                 size = m_binaryResponseBuilder->size();
                 blobData->appendBytes(m_binaryResponseBuilder->data(), size);
-                blobData->setContentType(finalResponseMIMETypeWithFallback());
+                blobData->setContentType(finalResponseMIMETypeWithFallback().lower());
                 m_binaryResponseBuilder.clear();
             }
             m_responseBlob = Blob::create(BlobDataHandle::create(blobData.release(), size));
         }
     }
 
     return m_responseBlob.get();
 }
 
 DOMArrayBuffer* XMLHttpRequest::responseArrayBuffer()
@@ skipping 1059 matching lines @@
 {
     ASSERT(m_downloadingToFile);
     OwnPtr<BlobData> blobData = BlobData::create();
     String filePath = m_response.downloadedFilePath();
     // If we errored out or got no data, we return an empty handle.
     if (!filePath.isEmpty() && m_lengthDownloadedToFile) {
         blobData->appendFile(filePath);
         // FIXME: finalResponseMIMETypeWithFallback() defaults to
         // text/xml which may be incorrect. Replace it with
         // finalResponseMIMEType() after compatibility investigation.
-        blobData->setContentType(finalResponseMIMETypeWithFallback());
+        blobData->setContentType(finalResponseMIMETypeWithFallback().lower());
     }
     return BlobDataHandle::create(blobData.release(), m_lengthDownloadedToFile);
 }
 
 void XMLHttpRequest::notifyParserStopped()
 {
     // This should only be called when response document is parsed asynchronously.
     ASSERT(m_responseDocumentParser);
     ASSERT(!m_responseDocumentParser->isParsing());
     ASSERT(!m_responseLegacyStream);
@@ skipping 271 matching lines @@
     visitor->trace(m_responseDocumentParser);
     visitor->trace(m_progressEventThrottle);
     visitor->trace(m_upload);
     visitor->trace(m_blobLoader);
     XMLHttpRequestEventTarget::trace(visitor);
     DocumentParserClient::trace(visitor);
     ActiveDOMObject::trace(visitor);
 }
 
 } // namespace blink